Pat Metheny Group is a jazz fusion group founded in 1977. The core members of the group are guitarist, composer and bandleader Pat Metheny; and keyboardist and composer Lyle Mays, who was part of the group's inception in 1977. Other long-standing members include bassist and producer Steve Rodby, who joined in 1981, and Paul Wertico, who was the group's drummer for 18 years from 1983 to 2001.